create_pr_for_submodule.yml

name: 'Create PR for submodule'

on:
  workflow_dispatch:
    inputs:
      submodule:
        description: 'Submodule to create a PR for'
        required: true
        type: choice
        options:
          - 'gw2auth.com-api'
          - 'gw2auth.com-canary'
          - 'gw2auth.com-cdk'
          - 'gw2auth.com-ui'
          - 'opentelemetry-lambda'
      submodule_ref:
        description: 'Ref of the submodule to create a PR for'
        required: true
        type: string
      submodule_branch:
        description: 'Branch of the submodule'
        required: false
        type: string
      target_override:
        description: 'Target branch override'
        required: false
        type: string

jobs:
  prepare_matrix:
    name: 'Prepare matrix'
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.featureset_match.outputs.result }}
    steps:
      - name: 'Checkout'
        uses: actions/checkout@v4
        with:
          sparse-checkout: |
            featuresets.js
          sparse-checkout-cone-mode: false
      - name: 'Featureset match'
        id: 'featureset_match'
        uses: actions/github-script@v7
        env:
          SUBMODULE: ${{ inputs.submodule }}
          SUBMODULE_REF: ${{ inputs.submodule_ref }}
          SUBMODULE_BRANCH: ${{ inputs.submodule_branch }}
          TARGET_OVERRIDE: ${{ inputs.target_override }}
        with:
          script: |
            const submodule = process.env.SUBMODULE;
            const submodule_ref = process.env.SUBMODULE_REF;
            const submodule_branch = process.env.SUBMODULE_BRANCH;
            const target_override = process.env.TARGET_OVERRIDE;
            const featuresets = require('./featuresets.js');

            const matrix = {include: []};
            
            if (target_override && target_override.length > 0) {
              matrix.include.push({target: target_override});
            } else {
              for (const [feature_branch, v] of Object.entries(featuresets)) {
                const allowed_sources = v[submodule];
            
                if (allowed_sources) {
                  for (const pattern of allowed_sources) {
                    if (new RegExp(pattern).test(submodule_ref) || new RegExp(pattern).test(submodule_branch)) {
                      matrix.include.push({target: feature_branch});
                      break;
                    }
                  }
                }
              }
            }
            
            console.info(`matrix: ${JSON.stringify(matrix)}`);
            return matrix;

  create_pr_branch:
    name: 'Prepare PR branch'
    runs-on: ubuntu-latest
    needs:
      - prepare_matrix
    strategy:
      matrix: ${{ fromJSON(needs.prepare_matrix.outputs.matrix) }}
    permissions:
      contents: write
    steps:
      - name: 'Checkout'
        uses: actions/checkout@v4
        with:
          ref: 'beta'
          ssh-key: ${{ secrets.CDK_SSH_KEY }}
          submodules: true
          fetch-depth: 0
      - name: 'Checkout target branch'
        run: 'git checkout ${{ matrix.target }} || git checkout -b ${{ matrix.target }}'
      - name: 'Push target branch'
        run: 'git push "https://${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git" ${{ matrix.target }}'
      - name: 'Checkout PR branch (1)'
        run: 'git checkout -b "pr/${{ matrix.target }}/${{ inputs.submodule }}" && git reset --hard ${{ matrix.target }}'
      - name: 'Update submodule ref (1)'
        working-directory: ${{ inputs.submodule }}
        run: 'git fetch origin "${{ inputs.submodule_ref }}" && git checkout "${{ inputs.submodule_ref }}"'
      - name: 'Commit changes (1)'
        run: |
          git config --local user.name "${{ github.actor }}"
          git config --local user.email "${{ github.actor_id }}+${{ github.actor }}@users.noreply.github.com"
          git add ${{ inputs.submodule }}
          git commit -m "update ${{ inputs.submodule }} to ${{ inputs.submodule_ref }}" || echo "ignore commit"
      - name: 'Push PR branch (1)'
        run: 'git push --force "https://${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git" "pr/${{ matrix.target }}/${{ inputs.submodule }}"'
      - name: 'Checkout PR branch (2)'
        run: 'git checkout ${{ matrix.target }} && (git checkout "pr/${{ matrix.target }}/all" || git checkout -b "pr/${{ matrix.target }}/all")'
      - name: 'Update submodule ref (2)'
        working-directory: ${{ inputs.submodule }}
        run: 'git fetch origin "${{ inputs.submodule_ref }}" && git checkout "${{ inputs.submodule_ref }}"'
      - name: 'Commit changes (2)'
        run: |
          git config --local user.name "${{ github.actor }}"
          git config --local user.email "${{ github.actor_id }}+${{ github.actor }}@users.noreply.github.com"
          git add ${{ inputs.submodule }}
          git commit -m "update ${{ inputs.submodule }} to ${{ inputs.submodule_ref }}" || echo "ignore commit"
      - name: 'Push PR branch (2)'
        run: 'git push --force "https://${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git" "pr/${{ matrix.target }}/all"'

  create_pr:
    name: 'Create PR'
    runs-on: ubuntu-latest
    needs:
      - prepare_matrix
      - create_pr_branch
    strategy:
      matrix: ${{ fromJSON(needs.prepare_matrix.outputs.matrix) }}
    permissions:
      pull-requests: write
    steps:
      - name: 'Create PR'
        uses: actions/github-script@v7
        with:
          script: |
            const { owner, repo } = context.repo;
            const base = '${{ matrix.target }}';
            const heads = [
              'pr/${{ matrix.target }}/${{ inputs.submodule }}',
              'pr/${{ matrix.target }}/all',
            ];
            
            for (const head of heads) {
              const pulls = await github.rest.pulls.list({
                owner: owner,
                repo: repo,
                head: `${owner}:${head}`,
                base: base,
                state: 'open',
              });
            
              if (pulls.data.length < 1) {
                try {
                  await github.rest.pulls.create({
                    title: `[CI] Merge ${head} into ${base}`,
                    owner: owner,
                    repo: repo,
                    head: head,
                    base: base,
                    body: [
                      'This PR is auto-generated by',
                      '[actions/github-script](https://github.com/actions/github-script)',
                    ].join('\n'),
                  });
                } catch (e) {
                  console.warn(e);
                }
              } else {
                const existingPR = pulls.data[0];
                await github.rest.issues.createComment({
                  owner: owner,
                  repo: repo,
                  issue_number: existingPR.number,
                  body: [
                    `Updated by Job ${context.job}`,
                  ].join('\n'),
                });
              }
            }